55545223 has 2 divisors, whose sum is σ = 55545224. Its totient is φ = 55545222.

The previous prime is 55545221. The next prime is 55545229. The reversal of 55545223 is 32254555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55545223 - 2¹ = 55545221 is a prime.

Together with 55545221, it forms a pair of twin primes.

It is equal to p_3312769 and since 55545223 and 3312769 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55545221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27772611 + 27772612.

It is an arithmetic number, because the mean of its divisors is an integer number (27772612).

Almost surely, 2^55545223 is an apocalyptic number.

55545223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55545223 is an equidigital number, since it uses as much as digits as its factorization.

55545223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 31.

The square root of 55545223 is about 7452.8667638701. The cubic root of 55545223 is about 381.5477570707.

Adding to 55545223 its reverse (32254555), we get a palindrome (87799778).

The spelling of 55545223 in words is "fifty-five million, five hundred forty-five thousand, two hundred twenty-three".